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authorTroy Kisky <troy.kisky@boundarydevices.com>2009-11-18 17:49:53 -0700
committerMark Brown <broonie@opensource.wolfsonmicro.com>2009-11-19 10:48:08 +0000
commit1e224f322bf22280957a5f76164d848526ed9b08 (patch)
treebdf7af09be46172aa6048bb25fda35980e8b2159 /sound/soc/davinci/davinci-pcm.h
parent1587ea31572e25a0a2c9c491b7f8c937b6c0454e (diff)
downloadlinux-1e224f322bf22280957a5f76164d848526ed9b08.tar.gz
ASoC: DaVinci: pcm, fix underrun by using sram
Fix underruns by using dma to copy 1st to sram in a ping/pong buffer style and then copying from the sram to the ASP. This also has the advantage of tolerating very long interrupt latency on dma completion. Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc/davinci/davinci-pcm.h')
-rw-r--r--sound/soc/davinci/davinci-pcm.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/sound/soc/davinci/davinci-pcm.h b/sound/soc/davinci/davinci-pcm.h
index c8b0d2baf05a..0764944cf10f 100644
--- a/sound/soc/davinci/davinci-pcm.h
+++ b/sound/soc/davinci/davinci-pcm.h
@@ -20,6 +20,7 @@ struct davinci_pcm_dma_params {
int channel; /* sync dma channel ID */
unsigned short acnt;
dma_addr_t dma_addr; /* device physical address for DMA */
+ unsigned sram_size;
enum dma_event_q eventq_no; /* event queue number */
unsigned char data_type; /* xfer data type */
unsigned char convert_mono_stereo;